DDJ-SX / Serato & Cross DJ (Mixvibes) / Audio Interface

I currently use the DDJ-SX with Serato, however heres the dilemma,
1) I want to integrate the 2no. Technics I have into my setup? Can I do this without the DVS add-on to Serato? Do I need or can I use an alternative audio interface other than the SL-3 or SL-4 (which I have had previously with Serato Scratch, but are very costly)
2) If this isn’t possible I’m looking into purchasing the Cross DJ software and moving over to their Software & DVS system, which I believe needs an audio interface. (Can anyone recommend a decent budget one that will enable be to connect both Technics?)
I currently prepare all my tunes in Serato but cannot use the cue points etc… in anything else but Serato, which is annoying as 90% of my mates and all the clubs use this with CDJs, so Option 2 has the added benefit of being Rekordbox integrated.
I’m not looking at spending hundreds here as the Cross DJ is only around $129 or say £85 and I was hoping to pick up an audio interface for around £100, so this would work out alot cheaper option than any Serato SL boxes (£400+).
Is it worth doing this? Any advice / pointers welcome.
Cheers
Rob
1) I want to integrate the 2no. Technics I have into my setup? Can I do this without the DVS add-on to Serato? Do I need or can I use an alternative audio interface other than the SL-3 or SL-4 (which I have had previously with Serato Scratch, but are very costly)
2) If this isn’t possible I’m looking into purchasing the Cross DJ software and moving over to their Software & DVS system, which I believe needs an audio interface. (Can anyone recommend a decent budget one that will enable be to connect both Technics?)
I currently prepare all my tunes in Serato but cannot use the cue points etc… in anything else but Serato, which is annoying as 90% of my mates and all the clubs use this with CDJs, so Option 2 has the added benefit of being Rekordbox integrated.
I’m not looking at spending hundreds here as the Cross DJ is only around $129 or say £85 and I was hoping to pick up an audio interface for around £100, so this would work out alot cheaper option than any Serato SL boxes (£400+).
Is it worth doing this? Any advice / pointers welcome.
Cheers
Rob